Breast pump



FIG. 1 is a right side elevational view, with the left side being a mirror image, of a breast pump showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The broken line showing of a human figure in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a breast pump, as shown and described. 